This series continues to have a really interesting premise, and I’m giving it some grace for how much it runs with that premise and treats it seriously. It took me a long time to get through this volume, though, because it’s getting a bit weird and the authors tend to fetishize the American frontier uncritically. I may come back to the series in the future, but not any time soon.

This was a Jason Snell recommendation on a recent episode of The Incomparable that I nearly skipped; I’m glad I didn’t, though, because this was a fascinating book. The premise—that humanity suddenly learns about and how to access parallel worlds to either “side” of Earth—is a fascinating one. In fact, this is the kind of great science fiction that starts with a wild concept and plays with it as long as it can.